A method for preventing and controlling water damage from a layer of coal mining
A technology of coal mining and layer separation, applied in drainage, mining equipment, earthwork drilling, etc., can solve the problems of difficult drilling, construction, grouting and sealing, and reduce the amount of water inflow and quantity in the mine And the effect of low price and reduction of drainage burden
Active Publication Date: 2021-11-12
LIUPANSHUI NORMAL UNIV
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Problems solved by technology
[0003] 1) Most of the prevention and control technologies for abscisional water inrush are dredging, and the dredging of aquifers will cause environmental problems such as ecological environment degradation, waste of water resources, and land subsidence;
[0004] 2) Most of the water is drained after coal mining, and it is very difficult to drill holes in the broken rock body after mining, and the construction is difficult;
[0005] 3) The amount of drained water increases. When the number of coal mine working faces increases, the drainage burden of the entire mine is huge, and there are subsequent safety hazards;
[0006] 4) Grouting is very difficult to block, and the effect of grouting will be reduced during coal mining. If it is repaired after mining, the amount of work will be huge and the economy will be unreasonable
Method used
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Embodiment 1
[0033] A coal mine mines the No. 4 coal seam, and the 4101 coal mining face (150 meters long inclination, 780 meters long in direction) has a huge thick Luohe Formation sandstone above it, which is very prone to water damage from the separation layer. In order to prevent the water damage from the separation layer, the following steps are taken Prevention and control of coal mining water hazards:
[0034] Step 1: Obtain mining and geological parameters before coal mining: establish a numerical similarity model based on geological data, and obtain the cycle of coal mining through simulation experiments to press step distance D to be 28 meters. The thickness of each rock layer above the coal seam is obtained through the drilling histogram, and the uniaxial compressive strength of each rock layer above the coal seam is obtained through sampling tests. There are 12 rock layers above the coal seam, and the thickness and uniaxial compressive strength of each rock layer from bottom to...
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The invention provides a method for preventing and controlling water damage from a separation layer in coal mining, which relates to the technical field of mine geology. A method for preventing and controlling water damage in a separation layer in coal mining comprises the following steps: obtaining mining and geological parameters before coal mining; designing directional drilling before coal mining area; implement directional drilling and perforation; perforation followed by perforation grouting; perforation and grouting followed by sealing and grouting; Drainage and supplementary grouting were carried out through layer observation; no water damage from layer separation occurred after coal mining was completed. The method is simple and easy to implement; has little impact on the environment; can reduce mine water inflow, reduce drainage burden, and has higher safety; the quantity and price of grouting slurry are lower, and the economy is reasonable.
Description
technical field [0001] The invention relates to the technical field of mine geology, in particular to a method for preventing and controlling water damage from a separation layer in coal mining. Background technique [0002] Coal mining is affected by many disasters, among which water damage is an important one. Mine water hazards include roof, floor, abscission layer, old empty area and other types, among which abscission layer water damage is of great significance due to its suddenness, difficulty in prevention and control, and great harm. At present, although there are many coal mining separation layer water damage prevention and control technologies, there are the following problems: [0003] 1) Most of the prevention and control technologies for abscisional water inrush are dredging, and the dredging of aquifers will cause environmental problems such as ecological environment degradation, waste of water resources, and land subsidence; [0004] 2) Most of the water is ...
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IPC IPC(8): E21F16/00E21B33/13
CPCE21B33/13E21F16/00
Inventor 高颖李涛
Owner LIUPANSHUI NORMAL UNIV